On Tuesday, the American Idol winner fired back at Davis for belittling her in his new autobiography The Soundtrack of My Life. But on Wednesday, the 80-year-old music exec defended his harsh portrayal of Clarkson.

"I am truly very sorry that she has decided to take issue with what I know to be an accurate depiction of our time together," Davis tweeted. "Before the book was published, I had every fact checked with five independent individuals who were present on a daily basis throughout it all. The chapter as it is written was thoroughly verified by each and every one of them. I stand by the chapter as written in my book."